Glass cutter



April 25, 1939. D. RESH 2,155,302

GLASS CUTTER Filed Feb. 3, 1938 Jam/kl Reaiz Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE GLASS CUTTER Daniel Resh, Charleston, W. Va.

Application February 3, 1938, Serial No. 188,568

3 Claims.

The invention relates to precision glass cutters for the cutting of flat glass, and one of the objects of the invention is to provide an instrument of this character which can be efficiently operated by either experienced or inexperienced workmen.

Another object of the invention is to provide an instrument of this character which will cut glass accurately, and which can be quickly and easily adjusted for fraction cutting.

' A further object of the invention is to provide an instrument of this character in which the cutting diamond or wheel can be adjusted to the desired position, and be held in its set position, allowing no wavering in scoring the glass.

Various other objects and advantages of the invention will be apparent to those skilled in the art, from the following detailed description, when taken in connection with the accompanying drawing; in which,

Figure 1 is a perspective view of the instrument in position for operation; the cutting table, the glass sheet, and the straight edge, all being broken away.

Figure 2 is another perspective view of the instrument, taken from a different angle; and

Figure 3 is a rear end view of the device.

Referring to the drawing in more detail, numeral l indicates a portion of a standard cutting table, numeral 2 indicates a portion of a sheet of glass to be cut, and numeral 3 indicates a. portion of an ordinary rule or straight edge commonly used in the cutting of glass.

Numeral 4 refers to the base plate of the instrument, and this plate is provided with downwardly extending angles or flanges 5 which ride along the face of the straight edge, thereby guiding the instrument in a straight line. The angles of course are of less depth than the thickness of the rule, so as not to contact with the surface of the glass to be cut.

The base plate 4 is provided with an undercut groove or guideway 6, in which is slidably mounted, with a neat fit, the body 1, provided with a handle 8.

Rotatably mounted in, and extending through the body 1, is a shaft 9. Fixed to the forward end of the shaft, by a pin or otherwise, is a short arm Hi. This arm is provided with an opening II, in which is slidably mounted a rod l 2 which carries at its lower end the usual cutting diamond I3. It will be understood, of course, that a cutting wheel or any other desired cutting means may be mounted on the rod in place of the diamond. The cutter carrying rod l 2 may be adjusted up or down in the arm, to the desired extent, and then be fixed in the desired position by the set screw [4.

Not only is the cutter carrying rod adjustable up or down, but also the cutting angle is variable as desired. A coil spring 15 is mounted on the rear end of the shaft 9, and has one end fixed to the body 1 and the other end fixed to a ring It. This coil spring tends to rotate the shaft 9 in the direction to elevate the arm in carrying the cutting tool. The ring I6 is provided with a shoulder I1, and the upward movement of the arm I0 is limited by this shoulder engaging a stop pin l8 projecting from the body 1. The ring I6 is loosely mounted on the shaft 9, and is secured thereto by a set screw l9. To vary the cutting angle, the set screw is loosened and the member I6 is turned about the shaft to the desired extent, and then secured to the shaft, in its new position, by the set screw. In operation, as will appear more fully hereinafter, pressure is exerted on the upper end of the rod 12 to contact the cutting diamond or wheel with the glass, and when the pressure is removed the coil spring lifts the cutter a slight distance from the glass.

As mentioned hereinbefore, the body 1 has a neat sliding fit in the guideway 6. For fraction cutting, the body is moved longitudinally the desired distance, and then looked in its adjusted position by a locking nut 20, which when turned down engages the body I, as best shown in Figure 3. The base plate carries a scale 2|, divided into increments of an inch, and the body is provided with a pointer 22. Thus by simply loosening the locking nut 20, the cutter can be moved forward any desired portion of an inch, for fraction cutting.

In the cutting of glass, the glass sheet is placed on a standard cutting table, which tables are provided with markings to indicate feet and inches. If a piece of glass is tobe cut of a certain number of feet and inches, or a certain number of inches, without a fraction of an inch, then a straight edge is placed at the correct position along the table, for the cutting of the exact length. The cutting instrument is now placed on the straight edge, in the manner illustrated in Figure 1. In the drawing the device has been set for cutting a fraction of an inch, but when cutting even inches, as now being described, the body 1 would be set with the pointer 22 coinciding with the rear end of the inch scale.

The handle 8 is. now grasped with the fingers, and pressure is applied to the top of the cutter carrying rod l2 to give a slight downward movement to the cutting diamond, or other cutting device, to bring it into contact with the glass.

The instrument is now moved along the straight edge, which acts as a guide, whereby the glass is scored in a perfectly straight and unwavering line. As soon as the pressure is removed from the cutter carrying rod I2, the diamond or other cutting tool is lifted slightly by reason of the spring I5.

To vary the cutting angle, the set screw I9 is loosened, and the abutment or shoulder I1 is adjusted to give the desired angle to the cutter carrying rod I 2, and then the cutter carrying rod is adjusted up or down, by means of the set screw Hi, to take care of the different angular setting,

When glass is to be cut of a length involving" a fraction of an inch, the straight edge is set as before, to the exact number of feet or inches, and then the locking nut 20 is loosened and the body 1 moved until the pointer 22 coincides with the desired fraction of an inch on the scale 2 l whereupon the body is locked in position by the nut 20. In the example illustrated in the drawing, the instrument is set for fraction cutting, and by reference to the scale it will be noted that the body, and consequently the cutter, has been moved forward Of course the operation of the device is exactly the same in fraction cutting as in ordinary cutting.

From the foregoing description, it will be apparent that I have devised a simple and inexpensive glass cutter, which can be eificiently operated by either experienced or inexperienced workmen, in which the cutting angle can be quickly and easily adjusted, and which can be accurately set for cutting any fraction of an inch.

Having fully described the invention, what I claim is:

1. A glass cutter including a base plate, means for guiding the plate along a straight edge, a body on the base plate, a shaft rotatably mounted in the body, an arm on the shaft, a downwardly extending rod carried by the arm, a cutting element mounted on the lower end of the rod, and means for adjusting the body in a horizontal plane toward and from said guiding means.

2. A glass cutter including a base plate, means for guiding the plate along a straight edge, a body on the base plate, a shaft rotatably mounted in the body, an arm on the shaft, a downwardly extending rodcarried by the arm, a cutting element mounted on the lower end of the rod, means for adjustingthe rod up and down in said arm, and said body being horizontally adjustable on the base plate toward and from said guiding means for fraction cutting.

3. A glass cutter including a base plate, means for guiding the plate along a straight edge, a body on the base plate, a shaft rotatably mounted in the body, an arm on the shaft, a downwardly extending rod carried by the arm, a cutting element mounted on the lower end of the rod, said body being horizontally adjustable on the base plate toward and from said guiding means, a scale for indicating said adjustment of the body, and means for locking the body in adjusted posi* tion.

DANIEL RESH. 

